A good design and a really original idea for a completely unique game. The only thing that came close to this in my mind would be the 1st phase from Spore, was that intentionnal?
Anyway a good game but the main problem is that it clearly lacks pacing and goals. That makes it perfect for small sessions but I don't see myself playing for more than a few minutes. Would be great if we could save our progression and get back to it later on. And smart phone would definitely be the right platform for it!